Pond filter



FIG. 1 is a perspective view of a pond filter showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof, the other side being a mirror image; and

FIG. 6 is a bottom plan view thereof.

The cross-line pattern which is partially shown for ease of illustration, represents a conventional fabric and is understood to repeat uniformly throughout the indicated area. 

The ornamental design for a pond filter, as shown and described. 